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Stephen Day

Gas Safe Engineer

Stephen Day is a Gas Safe registered and FGAS certified engineer with over 20 years of hands-on experience in the heating, cooling, and renewable energy industry, specialising in boiler installations, air conditioning, and heat pump systems.

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About Stephen Day

Stephen Day is a Gas Safe registered and FGAS certified engineer with over 20 years of hands-on experience in the heating, cooling and renewable energy industry.

Throughout his career, Stephen has designed, installed and maintained thousands of systems across homes and businesses in the UK. His background on the tools, combined with his directorship role at iHeat, gives him a rare understanding of both the technical and operational sides of the industry.

He has helped to secure Which? Trusted Trader accreditation all with a focus on delivering great service and long-term value for customers. He also writes for the iHeat blog, sharing practical advice and explaining heating topics in plain, helpful language.

Stephen continues to stay up to date with the latest heating technologies, building regulations and low-carbon innovations.

Expertise & Focus Areas

  • Boiler systems and installation
  • Heat pumps and hybrid heating systems
  • Gas safety and compliance
  • System design
  • Renewable and low-carbon technologies
  • Technical training


Articles by Stephen Day are reviewed by iHeat’s technical team for accuracy and reliability.

Stephen Day's latest articles

How to Fix Boiler Airlock: Expert Guide

30th May, 2025 Guides

How to Fix Boiler Airlock: Exp...

If you're struggling with a boiler airlock, our comprehensive guide can help. We explain t...

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Disadvantages of Oil Boilers: Exploring Key Concerns

30th May, 2025 Guides

Disadvantages of Oil Boilers:...

Oil boilers may be a popular choice for home heating, but they come with some significant...

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Boiler Makes - Quietest Brands

30th May, 2025 Guides

Boiler Makes - Quietest Brands

Want to find the quietest boiler brand for your home? Our guide compares the top-rated boi...

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How to Turn Off a Radiator

30th May, 2025 Guides

How to Turn Off a Radiator

Discover the comprehensive guide to understanding and turning off your radiator effectivel...

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What Size Heat Pump Do I Need? How To Choose The Right Size Heat Pump

30th May, 2025 Guides

What Size Heat Pump Do I Need?...

Understanding the perfect heat pump size for your UK home is vital for efficiency and comf...

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Heat Pump Maintenance

30th May, 2025 Guides

Heat Pump Maintenance

Welcome to iHeat, your trusted online boiler installation company! We are thrilled to intr...

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Megaflow System - What is a Megaflow System and How Much do they Cost?

30th May, 2025 Guides

Megaflow System - What is a Me...

Unveiling the Power of Megaflow: Transforming Your Home's Heating and Hot Water Experience

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Baxi Platinum+ System Boiler Review

30th May, 2025 Reviews

Baxi Platinum+ System Boiler R...

At iHeat, we pride ourselves on offering the finest heating solutions to our customers. To...

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Worcester Bosch C6 Boiler Error Code

30th May, 2025 Guides

Worcester Bosch C6 Boiler Erro...

When it comes to home heating, a reliable and efficient boiler is essential. However, boil...

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What is a Limescale Reducer or Inhibitor?

30th May, 2025 Guides

What is a Limescale Reducer or...

Limescale can be a pesky problem, but one that can be easily solved with just a few simple...

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Solar Panel Costs and Boiler Compatibility

30th May, 2025 Guides

Solar Panel Costs and Boiler C...

As the world continues to grapple with environmental challenges, the adoption of renewable...

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At What Age Should You Replace A Boiler?

30th May, 2025 Advice

At What Age Should You Replace...

Your boiler is one of the most important appliances in your home. It is responsible for ke...

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